Home / 139,253.85-192,170.16-78,823.44

Finding the Fourth Proportional to 139,253.85, 192,170.16 and 78,823.44

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Solution

The fourth proportional to 139,253.85, 192,170.16 and 78,823.44 is: 108,776.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,253.85 : 192,170.16 = 78,823.44 : x
  2. Step 2: Convert to fraction form
    139,253.85/192,170.16 = 78,823.44/x
  3. Step 3: Cross multiply
    139,253.85x = 192,170.16 × 78,823.44
  4. Step 4: Simplify right side
    139,253.85x = 15,147,513,076.55
  5. Step 5: Solve for x
    x = 15,147,513,076.55/139,253.85
  6. Step 6: Final answer
    x = 108,776.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.